The Mobile Monitor Field Monitor Pro is a reverse tablet

The Mobile Monitor Field Monitor Pro is a 15.4", 1280x800 monitor with a stand that sports a numpad. Intended for use with a laptop via USB and DisplayPort it gives you extra viewing area when you are on the go, as well as the numpad that most laptops lack. Tweaktown tried it out in a variety of ways, discovering that it is not really for gaming or movie watching but more for those working with their laptop who need more space for spreadsheets and other productivity software. If a couple of extra pounds sounds like a cheap price to pay for more screen area

"With the introduction of the laptop, the mobile office was created. You could take your show on the road and get some serious work done. Of course, you still had some limitations. Even today you have limitations; unless you want to carry around a laptop that weighs 10-15 pounds you are stuck with a small screen size.

Fortunately, you do not have to buy a gigantic laptop or one with an extended screen that will cost you an arm and a leg. Mobile Monitor Technologies has something that can help to overcome this limitation; the Field Monitor Pro."